Vessel-propeller.



K. 0. MULLER & P. FUEGMANN. VESSEL PROPELLER.

APPLICATION FILED T11R17, 1911.

1,009,333. Patented N0v.21, 1911.

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WMMW vwe Mow COLUMBIA PLANOGRAPH c0., WASHINGTON. o. c.

UNITED STATES PATENT OFFICE.

KARL OSKAR MITLLER, OF WEST HOBOKEN, AND PAUL FUEGMANN, OF UNION HILL,NEW JERSEY.

VEssEL-PRQPELLER.

Specification of Letters Patent. Patented N 21, 1911.

Application filed February 17, 1911. Serial No. 609,094.

To, all whom it may concern Be it known that we, KARL OSKAR LER and PAULFUEGMANN, both citizens of the United States of America, the formerresiding at West Hoboken, in the county of Hudson, and the latterresiding at Union Hill, in the county of Hudson,'both in the State ofNew Jersey, have invented certain new and useful Improvements in Vessel-Propellers, of which the following is a specification.

The object of our invention is to provide a new means for propellingvessels, that will be of greater efficiency and less expense than thehitherto used screw propellers.

With this and other objects in view, our new propeller consists ofsuitably formed swinging flaps or wings carried by reciprooatory rodsadapted to be operated from a suitable power source within the vessel,which flaps or wings act as pistons or buffers against the water inpropelling the vessel forward during their outward or rearward strokeand retard or propel the vessel rearward during their inward or forwardstroke.

In the present example, we have shown flaps or wings for the forward andrearward propulsion of the vessel, adapted to be operated separately.This construction, however, may be easily modified to allow of theirbeing operated by a common means. Furthermore, the flaps or wings may bemodified in their construction to serve for the propulsion of the vesselin either direction. These modifications may be made by those skilled inthe art without departing from the principle of our invention, and we,therefore, do not wish to be understood as restricting ourselves to theparticular construction described and shown.

In the drawing, which forms a part of this specification, similarreference letters denote corresponding parts, and Figure 1 is a sideelevation of the aft of a vessel, to which our new propeller is appliedand Figs. 2 and 3 are respectively cross sections on lines 22 and 33 ofFig. 1 illustrating the operation of the propeller,

Referring to the drawing, 1 denotes the body of the vessel, 2, 3reciprooatory rods extending longitudinally within the vessel andadapted to be operated from a suitable power source therein. Theoutwardly and rearwardly projecting end of the rod 2 carries a pair ofcollapsible flaps or wings 4 which are submerged in water and areadapted in their expanded or open position during their rearward stroketo propel the vessel. The flaps or wings 4 are hinged or otherwiserotatively secured to arms 5, which are fixed by means of a sleeve 6 to,the rear end of the rod 2. The flaps are limited in their swingingmotion at the front by blocks 7 or the like, fixed to the outer end ofthe rod 2, and at the rear by similar means 8 fixed to said flaps. Thefront blocks allow of the flaps or wings to swing into a position inwhich the same are at an angle of about 180 relative to one another,(see dotted line, Fig. 3) and serve to offer the necessary resistance tothe water pressure. The rear'blocks 8 are merely to prevent the flaps orwings from closing altogether during the inward or forward stroke.

The flaps or wings 9 for the retardation or retraction of the vessel(Fig. 2) which in the present example we have shown as arrangedon aseparate reciprooatory rod 3, just above the rod 2, are curved so thatwhen out of operation, they may bear around the curved surface of thebody of the vessel, and during their rearward stroke will offer smallresistance to the water pressure. These flaps are also capable ofswinging and their swinging movement in the rearward direction islimited by blocks 10 secured thereto. During their rearward stroke,these wings or flaps are caused to close as indicated by dotted lines inFig. 2, and during their forward stroke, to open, and thereby retard orretract the vessel. In the present example, the flaps are shown asarranged in the center, but it is understood that two or more pairs offlaps for the forward and rearward propulsion may be provided in orderto increase the efficiency thereof.

What we claim and desire to secure by Letters Patent is:

1. In combination with a vessel, a propeller, comprising a reciprooatoryrod projecting outward through the stern of the vessel, flaps pivoted tosaid rod and adapted to swing transversely thereto, projections on withone another to limit the swinging motion of said flaps in one directionand projections on the rod to limit the swinging movement of said flapsin the opposite direction.

2. In combination with a vessel, two pairs of reciprocatory collapsiblemembers of which one pair is adapted during its rearward stroke to openforwardly and the other is adapted during its forward stroke to openrearwardly, projections on the said members to limit the swingingmovement in one direction and projections for the members of one pair tolimit the swinging movement thereof in the opposite direction.

3. In combination with a vessel, a pro eller com arisin a reci rocatorrod rojecting outward through the stern of the vessel, and collapsibleflaps pivoted to said rod and curved so as to ofier the least resistanceduring the outward stroke thereof and to embrace the body of the vesselwhen, out of ope-ration.

4C. In combination with a vessel, a propeller, comprising areciprocatory rod projecting outward through the stern of the' 25 of inone direction.

In testimony whereof we affix our signatures in presence of twowitnesses.

KARL OSKAR MULLER. PAUL F UEGMANN.

Witnesses:

JOHN T. CARMODY, MAX D. ORDMANN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

